CA2202010C - Methode et appareil pour le fractionnement de l'air - Google Patents
Methode et appareil pour le fractionnement de l'air Download PDFInfo
- Publication number
- CA2202010C CA2202010C CA002202010A CA2202010A CA2202010C CA 2202010 C CA2202010 C CA 2202010C CA 002202010 A CA002202010 A CA 002202010A CA 2202010 A CA2202010 A CA 2202010A CA 2202010 C CA2202010 C CA 2202010C
- Authority
- CA
- Canada
- Prior art keywords
- stream
- oxygen
- column
- nitrogen generator
- liquid stream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000926 separation method Methods 0.000 title claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 132
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 66
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000001301 oxygen Substances 0.000 claims abstract description 49
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 49
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 52
- 238000001816 cooling Methods 0.000 claims description 11
- 239000003507 refrigerant Substances 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 7
- 238000010792 warming Methods 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 230000008016 vaporization Effects 0.000 claims 5
- 238000009834 vaporization Methods 0.000 claims 3
- 238000005057 refrigeration Methods 0.000 claims 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 229910052743 krypton Inorganic materials 0.000 description 2
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001868 water Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
- F25J3/0443—A main column system not otherwise provided, e.g. a modified double column flowsheet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/90—Details relating to column internals, e.g. structured packing, gas or liquid distribution
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/90—Details relating to column internals, e.g. structured packing, gas or liquid distribution
- F25J2200/94—Details relating to the withdrawal point
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
- F25J2215/56—Ultra high purity oxygen, i.e. generally more than 99,9% O2
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/50—Separating low boiling, i.e. more volatile components from oxygen, e.g. N2, Ar
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/02—Bath type boiler-condenser using thermo-siphon effect, e.g. with natural or forced circulation or pool boiling, i.e. core-in-kettle heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/20—Boiler-condenser with multiple exchanger cores in parallel or with multiple re-boiling or condensing streams
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Separation Of Gases By Adsorption (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Sampling And Sample Adjustment (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/649,147 US5689973A (en) | 1996-05-14 | 1996-05-14 | Air separation method and apparatus |
| US08/649,147 | 1996-05-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2202010A1 CA2202010A1 (fr) | 1997-11-14 |
| CA2202010C true CA2202010C (fr) | 2000-03-21 |
Family
ID=24603661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002202010A Expired - Fee Related CA2202010C (fr) | 1996-05-14 | 1997-04-07 | Methode et appareil pour le fractionnement de l'air |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US5689973A (fr) |
| EP (1) | EP0807792B1 (fr) |
| JP (1) | JP3940461B2 (fr) |
| KR (1) | KR100207890B1 (fr) |
| CN (1) | CN1117260C (fr) |
| AT (1) | ATE211248T1 (fr) |
| AU (1) | AU737791B2 (fr) |
| CA (1) | CA2202010C (fr) |
| DE (1) | DE69709234T2 (fr) |
| ID (1) | ID19527A (fr) |
| IL (1) | IL120550A (fr) |
| MY (1) | MY115081A (fr) |
| PL (1) | PL185432B1 (fr) |
| SG (1) | SG50821A1 (fr) |
| TR (1) | TR199700338A2 (fr) |
| TW (1) | TW355146B (fr) |
| ZA (1) | ZA973115B (fr) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5924307A (en) * | 1997-05-19 | 1999-07-20 | Praxair Technology, Inc. | Turbine/motor (generator) driven booster compressor |
| US6279345B1 (en) * | 2000-05-18 | 2001-08-28 | Praxair Technology, Inc. | Cryogenic air separation system with split kettle recycle |
| US6460373B1 (en) | 2001-12-04 | 2002-10-08 | Praxair Technology, Inc. | Cryogenic rectification system for producing high purity oxygen |
| FR2860576A1 (fr) * | 2003-10-01 | 2005-04-08 | Air Liquide | Appareil et procede de separation d'un melange gazeux par distillation cryogenique |
| US20070204652A1 (en) * | 2006-02-21 | 2007-09-06 | Musicus Paul | Process and apparatus for producing ultrapure oxygen |
| DE102007024168A1 (de) | 2007-05-24 | 2008-11-27 | Linde Ag | Verfahren und Vorrichtung zur Tieftemperatur-Luftzerlegung |
| DE102007051183A1 (de) * | 2007-10-25 | 2009-04-30 | Linde Aktiengesellschaft | Verfahren zur Tieftemperatur-Luftzerlegung |
| DE102007051184A1 (de) | 2007-10-25 | 2009-04-30 | Linde Aktiengesellschaft | Verfahren und Vorrichtung zur Tieftemperatur-Luftzerlegung |
| RU2415356C2 (ru) * | 2008-08-11 | 2011-03-27 | Михаил Юрьевич Савинов | Способ разделения многокомпонентной смеси |
| EP2789958A1 (fr) | 2013-04-10 | 2014-10-15 | Linde Aktiengesellschaft | Procédé de décomposition à basse température de l'air et installation de décomposition de l'air |
| KR101637292B1 (ko) | 2015-02-16 | 2016-07-20 | 현대자동차 주식회사 | 환류 세퍼레이터를 구비한 가스 응축 장치 |
| US10408536B2 (en) * | 2017-09-05 | 2019-09-10 | Praxair Technology, Inc. | System and method for recovery of neon and helium from an air separation unit |
| US12104850B2 (en) * | 2021-05-06 | 2024-10-01 | Air Products And Chemicals, Inc. | Fluid recovery process and apparatus for xenon and or krypton recovery |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61110872A (ja) * | 1984-11-02 | 1986-05-29 | 日本酸素株式会社 | 窒素製造方法 |
| US4867772A (en) * | 1988-11-29 | 1989-09-19 | Liquid Air Engineering Corporation | Cryogenic gas purification process and apparatus |
| US5049173A (en) * | 1990-03-06 | 1991-09-17 | Air Products And Chemicals, Inc. | Production of ultra-high purity oxygen from cryogenic air separation plants |
| US5205127A (en) * | 1990-08-06 | 1993-04-27 | Air Products And Chemicals, Inc. | Cryogenic process for producing ultra high purity nitrogen |
| US5385024A (en) * | 1993-09-29 | 1995-01-31 | Praxair Technology, Inc. | Cryogenic rectification system with improved recovery |
| US5582034A (en) * | 1995-11-07 | 1996-12-10 | The Boc Group, Inc. | Air separation method and apparatus for producing nitrogen |
-
1996
- 1996-05-14 US US08/649,147 patent/US5689973A/en not_active Expired - Lifetime
-
1997
- 1997-03-28 IL IL12055097A patent/IL120550A/xx not_active IP Right Cessation
- 1997-04-03 TW TW086104269A patent/TW355146B/zh not_active IP Right Cessation
- 1997-04-04 AU AU17733/97A patent/AU737791B2/en not_active Ceased
- 1997-04-07 CA CA002202010A patent/CA2202010C/fr not_active Expired - Fee Related
- 1997-04-09 JP JP09043997A patent/JP3940461B2/ja not_active Expired - Fee Related
- 1997-04-11 ZA ZA9703115A patent/ZA973115B/xx unknown
- 1997-04-15 ID IDP971250A patent/ID19527A/id unknown
- 1997-04-17 SG SG1997001257A patent/SG50821A1/en unknown
- 1997-05-02 TR TR97/00338A patent/TR199700338A2/xx unknown
- 1997-05-09 MY MYPI97002034A patent/MY115081A/en unknown
- 1997-05-12 PL PL97319928A patent/PL185432B1/pl not_active IP Right Cessation
- 1997-05-13 EP EP97303252A patent/EP0807792B1/fr not_active Expired - Lifetime
- 1997-05-13 KR KR1019970018443A patent/KR100207890B1/ko not_active Expired - Fee Related
- 1997-05-13 DE DE69709234T patent/DE69709234T2/de not_active Expired - Lifetime
- 1997-05-13 CN CN97111583A patent/CN1117260C/zh not_active Expired - Fee Related
- 1997-05-13 AT AT97303252T patent/ATE211248T1/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| SG50821A1 (en) | 1998-07-20 |
| IL120550A (en) | 2000-08-13 |
| PL185432B1 (pl) | 2003-05-30 |
| TW355146B (en) | 1999-04-01 |
| KR970075808A (ko) | 1997-12-10 |
| ATE211248T1 (de) | 2002-01-15 |
| MY115081A (en) | 2003-03-31 |
| MX9703268A (es) | 1997-11-29 |
| EP0807792A2 (fr) | 1997-11-19 |
| IL120550A0 (en) | 1997-07-13 |
| DE69709234D1 (de) | 2002-01-31 |
| EP0807792B1 (fr) | 2001-12-19 |
| US5689973A (en) | 1997-11-25 |
| AU1773397A (en) | 1997-11-20 |
| KR100207890B1 (ko) | 1999-07-15 |
| TR199700338A2 (xx) | 1997-12-21 |
| CA2202010A1 (fr) | 1997-11-14 |
| AU737791B2 (en) | 2001-08-30 |
| JPH1047853A (ja) | 1998-02-20 |
| ZA973115B (en) | 1997-11-05 |
| ID19527A (id) | 1998-07-16 |
| EP0807792A3 (fr) | 1998-03-11 |
| JP3940461B2 (ja) | 2007-07-04 |
| CN1177726A (zh) | 1998-04-01 |
| DE69709234T2 (de) | 2002-08-14 |
| PL319928A1 (en) | 1997-11-24 |
| CN1117260C (zh) | 2003-08-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20130408 |